Since I started transitioning 6 months ago, the costs have decresed.
On average, about $45 a month. That includes poo, cheap conditioner, good deep conditioner, protein reconstructor, gel, oils, moisturizers (S-curl, sta so sof, infusium 23, etc), and rubber bands, phony ponies.
No supplements (yet!), no relaxers, occasional salon visits for a press.